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Title: Expectation vs. Reality: The Unexpected Abrasive Nature of Biomass Feedstocks

Abstract

Early reports coming from stover-fed biorefineries have indicated that the feedstock is damaging equipment due to wear caused by the feedstock. It is suspected that biomass ash, both physiological and introduced ash, is responsible for the accelerated rates of wear being observed. Biomass ash can contain several different types of minerals, some of which are very hard. To simulate biomass wear on material handling equipment, a sandblaster was modified to shoot ground biomass at a metal coupon. The angle of impingement was set at 90°, 65.5°, or 45° by rotating the coupon. The coupon was weighed before and after shooting a known quantity of biomass to determine mass loss, and the surface characteristics of the blasted coupon were analyzed using laser microscopy. Coupon mass loss was positively correlated with ash content. Coupons blasted with loblolly pine (0.58% ash) lost 2.2mg±0.3mg per kg biomass shot, while high-ash stover (12.56% ash) coupons lost 104.7±2.1mg per kg biomass shot. Coupons blasted with NaOH leached low-ash stover (4.01% ash) lost 10.1±2.7mg per kg biomass shot. Decreasing the angle of impingement (90° to 45°) increased mass loss by about 17%. The concentrations of soil elements (silicon, aluminum, iron, titanium, sodium) were positively correlated with couponmore » mass loss, indicating that introduced ash is likely the primary source of wear to equipment. Future studies will identify mineral forms of ash present in biomass to further characterize biomass wear properties and to identify strategies to improve biomass quality.« less

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Idaho National Laboratory
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1498786
Report Number(s):
INL/CON-17-44037-Rev000
DOE Contract Number:  
AC07-05ID14517
Resource Type:
Conference
Resource Relation:
Conference: Symposium on Biotechnology for Fuels and Chemicals, Clearwater Beach, FL, 04/29/2018 - 05/02/2018
Country of Publication:
United States
Language:
English
Subject:
09 - BIOMASS FUELS; Biomass Wear; Bioenergy; Biomass ash

Citation Formats

Lacey, Jeffrey A., Aston, John E., and Thompson, Vicki S.. Expectation vs. Reality: The Unexpected Abrasive Nature of Biomass Feedstocks. United States: N. p., 2018. Web.
Lacey, Jeffrey A., Aston, John E., & Thompson, Vicki S.. Expectation vs. Reality: The Unexpected Abrasive Nature of Biomass Feedstocks. United States.
Lacey, Jeffrey A., Aston, John E., and Thompson, Vicki S.. Tue . "Expectation vs. Reality: The Unexpected Abrasive Nature of Biomass Feedstocks". United States. https://www.osti.gov/servlets/purl/1498786.
@article{osti_1498786,
title = {Expectation vs. Reality: The Unexpected Abrasive Nature of Biomass Feedstocks},
author = {Lacey, Jeffrey A. and Aston, John E. and Thompson, Vicki S.},
abstractNote = {Early reports coming from stover-fed biorefineries have indicated that the feedstock is damaging equipment due to wear caused by the feedstock. It is suspected that biomass ash, both physiological and introduced ash, is responsible for the accelerated rates of wear being observed. Biomass ash can contain several different types of minerals, some of which are very hard. To simulate biomass wear on material handling equipment, a sandblaster was modified to shoot ground biomass at a metal coupon. The angle of impingement was set at 90°, 65.5°, or 45° by rotating the coupon. The coupon was weighed before and after shooting a known quantity of biomass to determine mass loss, and the surface characteristics of the blasted coupon were analyzed using laser microscopy. Coupon mass loss was positively correlated with ash content. Coupons blasted with loblolly pine (0.58% ash) lost 2.2mg±0.3mg per kg biomass shot, while high-ash stover (12.56% ash) coupons lost 104.7±2.1mg per kg biomass shot. Coupons blasted with NaOH leached low-ash stover (4.01% ash) lost 10.1±2.7mg per kg biomass shot. Decreasing the angle of impingement (90° to 45°) increased mass loss by about 17%. The concentrations of soil elements (silicon, aluminum, iron, titanium, sodium) were positively correlated with coupon mass loss, indicating that introduced ash is likely the primary source of wear to equipment. Future studies will identify mineral forms of ash present in biomass to further characterize biomass wear properties and to identify strategies to improve biomass quality.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {5}
}

Conference:
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